How to create an XQuery for an XML type data source

Question

Hi,
1.I have data contained in an XML format.
Hence I have created a physical data source for XML type data.
2.I have created a logical view to broker data from several disparate physical data sources.I have called this as UnifiedView.
3.I have created a function called getUnifiedView() to obtain data from all the physical sources
4.Upto this point, I have not faced any problems.
5.However when i try writing a simple XQuery for the physical XML datasource such as
$Sh-data/PublicIdentifiers/MSISDN="1234567"
I get result as (For example):
<HSS>
<MSISDN> 1234567 111111 222222 </MSISDN>
</HSS>
Could you please help me getting the where clause output?
I have attached the schema and XML files used for further information.
Regards
Vidya

Answer 1

Hi mReiche,
I later on resolved the previously mentioned error and try out the XQuery as suggested by you.
for $MSISDN in ns0:Sh-data()/PublicIdentifiers/MSISDN
where $MSISDN="1234567"
return
<HSS>
<MSISDN>{data($MSISDN)}</MSISDN>
</HSS>
It works! Thanks.
Now i am trying to retrieve data from 2 XML documents and an LDAP query.
I have the following data sources:
1.LDAP queried by Java Function
2.HSS xml
3.Presence xml
I want to match the telephoneNumber of the LDAP with MSISDN in the HSS.xml.
Next i want to match the SIP_URI in the HSS.xml with Contact of the Presence.xml
Given below is the XQuery which i have written to achieve the above:
for $x0 in ns5:FindDN($str_mailId)
for $Sh-Data in ns2:Sh-Data()
where $x0 = $Sh-Data/PublicIdentifiers/MSISDN
for $presence in ns3:presence()
where $Sh-Data/Sh-IMS-Data/SCSCFName = $presence/ns4:tuple/ns4:contact
return
On executing this XQuery i am getting the following error:
java.lang.NullPointerException: null
     at weblogic.xml.query.types.XQueryAtomicType.commonSuperTypeOf(XQueryAtomicType.java:150)
     at weblogic.xml.query.types.XQueryType.comparisonTypeOf(XQueryType.java:324)
     at weblogic.xml.query.runtime.compare.GeneralAtomicComparison.compare(GeneralAtomicComparison.java:50)
     at weblogic.xml.query.runtime.compare.ComparisonIterator.fetchNext(ComparisonIterator.java:50)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.logic.BoolEffValue.exec(BoolEffValue.java:51)
     at weblogic.xml.query.runtime.logic.BoolEffValue.fetchNext(BoolEffValue.java:47)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.IfThenElse.fetchNext(IfThenElse.java:79)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.CountMapIterator.fetchNext(CountMapIterator.java:162)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.CountMapIterator.fetchNext(CountMapIterator.java:162)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.sequences.Exists.fetchNext(Exists.java:40)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.IfThenElse.fetchNext(IfThenElse.java:79)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.LetIterator.fetchNext(LetIterator.java:133)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.LetIterator.fetchNext(LetIterator.java:133)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.querycide.QueryAssassin.fetchNext(QueryAssassin.java:54)
     at weblogic.xml.query.iterators.GenericIterator.peekNext(GenericIterator.java:151)
     at weblogic.xml.query.runtime.qname.InsertNamespaces.fetchNext(InsertNamespaces.java:161)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.QueryIterator.fetchNext(QueryIterator.java:127)
     at weblogic.xml.query.iterators.GenericIterator.hasNext(GenericIterator.java:134)
     at weblogic.xml.query.xdbc.util.Serializer.serializeItems(Serializer.java:142)
     at com.bea.ld.server.QueryInvocation.getResult(QueryInvocation.java:461)
     at com.bea.ld.EJBRequestHandler.executeFunction(EJBRequestHandler.java:346)
     at com.bea.ld.ServerBean.executeFunction(ServerBean.java:108)
Please find attached the XML documents which i am using.
Could you pls let me know how to resolve this.